HP Brio ba600 User Manual page 41

PC Has an Audio (Sound) Problem
Problem
No sound when running
any applications.
No sound when playing a
multimedia/audio CD
A new add-on sound card
does not work.
No output from the 8-bit or
16-bit digitized sounds.
Audio input from the
microphone is too low, or
no audio at all.
Humming noise.
The PC hangs while
recording.
To try and fix this ...
Check the volume, mute, and balance settings. Refer to the operating system documentation for
more information.
Absence of sound can also be caused by a hardware conflict. Hardware conflicts occur when two
or more peripheral devices compete for the same signal lines or channels. Conflicts between your
audio interface and another peripheral device might be due to the settings of the I/O addresses, IRQ
channel, or DMA channel. To resolve the conflict, change the settings of the audio interface or of
any other ISA accessory in your system (note that BA400 models do not have an ISA slot).
Check that the volume control on the CD-ROM drive is correctly set or that the audio cable for the
CD-ROM drive is correctly connected to the connector on the system board (refer to page 49). If
you are using headphones or speakers, ensure they are correctly connected (refer to page 4).
If you install an add-on sound card, you will need to disable the integrated sound features on your
PC. To disable integrated sound (on Windows 95, Windows 98 and Windows NT 4.0), select
Control Panel from the S S S S t t t t a a a a r r r r t t t t menu, then click on Multimedia
Audio Device icon, then select the Do not use audio features on this device radio button.
This might be due to the DMA channel selected or to an interrupt conflict. Use your operating
system's audio control software to change the audio interface's DMA channel or IRQ setting.
Check that the microphone specifications meet the requirements of the 16-bit sound components.
The microphone should be a 600-ohm electret type.
If the power grounding of your audio components is inadequate, a humming noise may be
generated. Plug all devices into adjacent power outlets (outlets within 5 cm / 2 inches of each
other), or use line filters.
Uncompressed digital audio can eventually fill your hard disk. For example, one minute of stereo
sound recorded at a resolution of 44 kHz will occupy about 10.5 MB. Before recording, check that
there is enough free space on your hard disk.
Data compression can reduce the space required. The A-law and m-law hardware compression
used by the audio interface enables the sampling of sound at a resolution of 16-bits, but it
generates the same quantity of data as an 8-bit sample.
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